Am I missing anything that would prevent the user from being logged in? The Users registrationstatus changes to approved, but they are not logged in? No errors etc.; is there anything I maybe missing in settings? Thanks for your thoughts in anticipation,
cheers dyrgutt

Yeah, due to my exceptional coding skills *cough*, I get to hang out at the logs more than I care to imagine, so I was as surprised as you when nothing popped up; as in, I was writing to the logger as well to check my progress and all messages prior/during/after
the call came through.

To fill you in a bit more, I’m receiving a ‘developer test’ PayPal IPN, and upon receipt of confirmed donation, I approve the registrationstatus, then *hopefully* log the user in – that’s where it goes amiss. I’m
thinking doing it through the IPN may be the issue – perhaps I can only do it thought the PDT? Any thoughts very much appreciated as per usual, cheers Dyr

Oh! If I understand corectly, you are trying to log the user in in response to an HTTP request from the server of PayPal? If it's a server to server request indeed, then there's no way to sign in the user at that point. The reason being of course that the
Signin method will create a cookie, which will be sent to the server of PayPal, not to the browser session of your user.

Instead, you need to sign in the user when handling a request that comes from his browser.
If that is already the case, then I'm clueless still.

Yeah, I believe you're right mate - I ended up transposing the code to the PDT [a simple view on my site that handles the redirect/receipt of PayPal confirmation details], not as fool-proof as the IPN [as a user may abort the redirect process/prematurely
exit; but so be it, they'll just have to login manually]. Anyhow, it works - so i'm very happy. A thousand thanks for all your efforts mate, and respect to all the help you offer everyone here on the forum, very grateful - cheers Dyr